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EP1194081A1 - Stent enroule en spirale - Google Patents

Stent enroule en spirale

Info

Publication number
EP1194081A1
EP1194081A1 EP00945010A EP00945010A EP1194081A1 EP 1194081 A1 EP1194081 A1 EP 1194081A1 EP 00945010 A EP00945010 A EP 00945010A EP 00945010 A EP00945010 A EP 00945010A EP 1194081 A1 EP1194081 A1 EP 1194081A1
Authority
EP
European Patent Office
Prior art keywords
stent
pattern
connectors
ribbon
struts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00945010A
Other languages
German (de)
English (en)
Inventor
Scott Smith
Brian Brown
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boston Scientific Ltd Barbados
Original Assignee
Boston Scientific Ltd Barbados
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boston Scientific Ltd Barbados filed Critical Boston Scientific Ltd Barbados
Publication of EP1194081A1 publication Critical patent/EP1194081A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/91533—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other characterised by the phase between adjacent bands
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
    • A61F2/915—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes with bands having a meander structure, adjacent bands being connected to each other
    • A61F2002/9155—Adjacent bands being connected to each other
    • A61F2002/91558—Adjacent bands being connected to each other connected peak to peak

Definitions

  • This invention relates generally to a method of constructing an expandable tubular stent from a flat wire or ribbon. More particularly, the present invention is directed to such a stent formed from an elongate ribbon having portions cut therefrom where the cut ribbon is wound into a cylindrical stent configuration.
  • a stent is a generally longitudinal tubular device formed of biocompatible material which is useful in the treatment of stenosis, strictures or aneurysms in body vessels such as blood vessels. These devices are implanted within the vessel to reinforce collapsing, partially occluded, weakened or abnormally dilated sections of the vessel. Stents are typically employed after angioplasty of a blood vessel to prevent re-stenosis of the diseased vessel. While stents are most notably used in blood vessels, stents may also be implanted in other body vessels such as the urogenital tract and bile duct.
  • Stents generally include an open flexible configuration. This configuration allows the stent to be inserted through curved vessels. Furthermore, this configuration allows the stent to be configured in a radially compressed state for intraluminal catheter implantation. Once properly positioned adjacent the damaged vessel, the stent is radially expanded so as to support and reinforce the vessel. Radial expansion of the stent may be accomplished by inflation of a balloon attached to the catheter or the stent may be of the self-expanding variety which will radially expand once deployed. Structures which have been used as intraluminal vascular grafts have included coiled stainless steel springs; helically wound coil springs manufactured from a heatsensitive material; and expanding stainless steel stents formed of stainless steel wire in a zig-zag pattern.
  • the present invention prevents reoccurrence of occlusions in a passageway and prevents recoil of a vessel wall by providing an expandable tubular stent of generally open, cylindrical configuration that utilizes reduced thickness struts. Such a stent prevents recoil of body passageway walls and allows elongation of the stent to prevent migration of the stent within a luminal structure.
  • the present invention provides a self-expanding tubular stent comprising a plurality of stent segments.
  • Each stent segment is formed of an elongate ribbon having portions cut therefrom to form a wave-like undulating pattern, opposed edges of which are attached to one another so as to form a generally cylindrical configuration.
  • a disclosed method effects formation of such an expandable tubular stent by first providing an elongate flat ribbon of biocompatible stent material and selectively removing portions of such material to form an undulating wave-like pattern along the length of the ribbon.
  • the ribbon is then wound into a generally cylindrical configuration, and opposed ends of the ribbon are secured to one another to form a generally cylindrical and expandable spiral stent section.
  • the stent sections are arranged in longitudinal succession and interconnected so as to form an elongated stent configuration.
  • Figure 1 shows a plan view of an expandable tubular stent of the prior art.
  • Figure 2 shows an expandable spiral wound stent segment of the present invention.
  • Figure 2A shows an elongated stent utilizing plural expandable stent segments of Figure 2.
  • Figure 2B shows a perspective view of a stretched and radially expanded stent of Figure 2.
  • Figure 3 shows a plan view of a piece of flat ribbon-like stent material used to form the spiral wound stent of the present invention.
  • Figure 3 A shows a plan view of the flat material of Figure 3 having lateral slits cut or etched therethrough.
  • Figure 3B shows a plan view of the cut material of Figure 3 A after stretching thereof to define a wavelike formation.
  • Figure 3C shows a plan view of an alternative wavelike formation of the material in Figure 3.
  • Figure 3D shows a plan view of an alternative wavelike formation of the material of Figure 3.
  • Figure 3E shows a plan view of an alternative wavelike formation of the material of Figure 3 having a non-uniform cross-section.
  • Figure 4 shows a plan view of a multiple stent segments formed from planar sheets of stent material and having a connector affixed therebetween.
  • Figure 5 shows a plan view of a stent segment formed from the material of Figure 3 having connectors of one-half width.
  • Figure 6 shows a plan view of an elongated stent utilizing plural expandable stent segments of Figure 5.
  • Figure 7 shows an exploded view of a joint region at which stent segments of Figure 5 are affixed.
  • the present invention is a multiple-segment slotted tube which is particularly suited for use as an endoprosthesis.
  • a flat ribbon or wire comprised of biocompatible material is provided wherein the ribbon has predetermined length, width and thickness.
  • a stent is formed from this material by forming cuts in the material so that the cut material can be stretched to form an undulating wave-like pattern.
  • the cut ribbon is then spirally wound into a generally cylindrical shape to form a stent segment.
  • Plural stent segments can be affixed to one another in longitudinal succession to form an elongate stent using a connector which is formed from the ribbon. Interconnection between adjacent stent segments is achieved by combining two connectors where the connectors may be fabricated at one-half their original width and bonded together by welding or other means.
  • Figure 1 shows an elongated tubular stent of the prior art as disclosed in commonly assigned International Application No. PCT/US96/02615 to Brown et al., which is incorporated by reference herein.
  • Brown discloses a segmented articulatable stent 10 of open structure, comprised of a plurality of parallel struts 12 aligned on a common longitudinal axis / having annular connectors 14 disposed therebetween.
  • Stent 10 has opposed edges 16a and 16b which, when connected, define a central lumen of a generally tubular stent body.
  • the body therebetween of stent 10 defines an interior surface 18 and an exposed exterior surface 20.
  • the stent is formed to have a generally open 5 configuration having a plurality of passages or openings 22 therethrough. These openings provide for longitudinal flexibility of the stent as well as to permit the stent to be radially expanded once deployed in a body lumen such as a blood vessel.
  • this stent provides satisfactory performance, yet is relatively difficult and costly to construct. As cutting of the stent configuration is
  • etching involves difficult processing techniques which require state-of-the-art cutting machinery and costly supervision of the cutting process. If etching is conducted on a tubular article, extra resources must be
  • the present invention provides an improved method of forming a stent 10 of the type shown in Figure 1.
  • a single stent segment 100 of configuration similar to that shown in Figure 1 is shown.
  • Stent segment 100 includes a plurality of struts 112 which undulate in a wavelike pattern 113 having period P. While stent segment 100 may be employed as a stent in certain situations, more commonly to achieve enhanced kink resistance and flexibility, multiple stent segments 100 may be affixed to one another to
  • Stent 100 is formed from an elongate ribbon 200 which may a biocompatible stent material of the type typically used in the formation of conventional stents.
  • the present invention is applicable to self-expanding stent configurations as well as mechanically expandable configurations; therefore, the material composition of the ribbon may be chosen from a wide variety of well-known and utilized stent materials.
  • the stent may be made from stainless steel, titanium, platinum, gold and other biocompatible materials. Thermoplastic materials which are inert in the body may also be employed.
  • the stent is preferably formed from a temperature-sensitive memory alloy which changes shape at a designated temperature or temperature range. Shaped memory alloys having superelastic properties generally made from specific ratios of nickel and titanium, commonly known as Nitinol, are among the preferred stent materials.
  • ribbon 200 is of predetermined length /, width w and thickness corresponding to the desired parameters and performance of a generally cylindrical stent to be formed therefrom.
  • Ribbon 200 also has opposing transverse edges 200a and 200b which, as will be described below in further detail, may be affixed to one another after further fabrication to form a generally cylindrical shape.
  • a plurality of spaced-apart, lateral cuts 204 are made in ribbon 200.
  • cuts 204 extend alternately from opposed longitudinal sides 200c and 200d.
  • the cut ribbon is then stretched from the configuration shown in Figure 3B by applying an opposable longitudinal pulling force on the ribbon at transverse edges 200a and 200b, indicated by arrows A and B.
  • an undulating wave-like pattern 206 is produced wherein each wave has an amplitude a that corresponds to the width of ribbon 200.
  • the period P of each wave corresponds to period P of stent segment 100 from which each strut 112 is formed.
  • cuts 204 may be formed by a laser.
  • other flat sheet techniques such as chemical etching or electrical discharge machining (EDM) may be employed to form cuts 204.
  • EDM electrical discharge machining
  • these processes can be performed on a flat ribbon faster and with higher quality than is possible on workpieces having tubular configuration such as noted previously with respect to the prior art device of Figure 1.
  • Cutting of a flat ribbon results in stents having fewer burrs and misaligned cuts over those found in stents formed from material which was cut in its tubular configuration.
  • Each cut 204 extends a predetermined distance across the width of ribbon 200, wherein such distance is dictated by the desired geometry of the wave produced by the cuts.
  • cuts 204 may produce different undulating patterns, such as an angular wave pattern shown in Figure 3D, a serpentine pattern shown in Figure 3E and a non-uniform, undulating pattern shown in Figure 3F.
  • the selection of wave geometry is dependent upon numerous factors, such as the duration of implantation and the geometry of the vascular section within which implantation occurs. Thus, the wavelike configuration resulting from such open cuts is not limited to the types shown herein.
  • ribbon 200 is then formed into the tubular shape shown in Figure 2B by rolling the pattern so as to bring transverse edges 200a and 200b together. The edges may then be joined by welding or the like, forming tubular stent segment 100.
  • stent 100 of Figure 2 can be used in certain applications where limited support of a vascular section is desired, as mentioned above it may be advantageous to provide an elongated stent for longer and more tortuous vascular regions.
  • plural stent segments 100 are arranged in spaced longitudinal succession.
  • the spaced-apart stent segments are interconnected by connectors 114.
  • Each connector 114 enables connection of adjacent stent segments 100 at tangential opposing endpoints corresponding to offset struts 112a and 112b.
  • a connector 114 can be fabricated from an extension 210 (depicted by the broken line in Figure 3C).
  • Connector 114 can be formed therefrom by bending and heat setting extension 210 into a position protruding outward from the pattern 206.
  • An extension can be similarly fabricated for various wave configurations, as depicted in broken lines in Figures 3D and 3E.
  • An elongate stent 100' of the type shown in Figure 2 A can now be formed in accordance with a method of the present invention.
  • multiple sheets 200 can be used to form the plural expandable stent segment of Figure 2A.
  • a select number of sheets 200 are formed into undulating stent patterns as shown, which patterns can be any of the sinusoidal or other geometrical patterns described hereinbefore.
  • At least one extension 210 is fabricated from each stent pattern to produce a corresponding connector 114 that enables attachment of successively aligned stents.
  • a plurality of connectors 114 facilitate attachment of adjacent stent segments 100 in longitudinal succession by welding or otherwise affixing a connector from one strut 112a to an adjacent offset strut 112b.
  • Struts 5 112a and 112b are interconnected at opposing strut end portions 112a' and 112b'.
  • Strut end portions 112a' and 112b' as shown are generally elliptical but may be rounded, square, pointed or the like. Any configuration of end portions may be employed so long as it provides an undulating pattern, as shown.
  • the flat form 200 (Fig. 3C) is formed into an unexpanded tube, the segments are cylindrical but the strut 0 end portions 112a' and 112b' of adjacent stent segments remain in an opposed position relative to each other.
  • Positioning of connectors 114 so as to interconnect adjacent stent segments 100 is depicted in such a manner that there are three or more struts 112 between points of connection from one side of each segment to its other side. Additionally, the connectors 5 extend angularly from a connecting end portion of one stent segment to a connecting end portion of an adjacent stent segment so as to achieve tangential intersection with corresponding parallel struts 112. Upon expansion of the stent, the adjacent stent segments are displaced relative to each other about the periphery of the stent body to accommodate flexing of the stent within paired struts without interference between 0 adjacent stent segments, rather than by means of articulating flexible connectors between segments.
  • connector spacing is shown, it is understood that the connector may placed in a different configuration relative to the number of struts present within any given stent segment.
  • the comparative number of connectors to struts can vary, depending upon the end use of the stent and its performance requirements in a 5 vascular conduit.
  • Connectors 114 extend from strut end portion 112a' of stent segment 100 to another strut end portion 112b' of an adjacent stent segment 100a, which is not directly longitudinally adjacent. Rather, the angular orientation of connectors 114 interconnects radially staggered end portions. There are at least three struts 112 included between the 0 points on each side of a stent segment 100 at which a connector 114 contacts a corresponding end portion 112a' or 112b'. This results in the connectors 114 extending in an angular direction between stent portions around the periphery of the tubular stent. Connectors 114 are preferably of the same length, but may vary from one stent segment to another.
  • the diagonal direction may be reversed from one stent segment to another, extending upwardly in one case and downwardly in another, 5 although all connectors between any pair of stent segments are substantially parallel.
  • the connectors 114 extend downwardly, right to left.
  • the closest adjacent end portions 112a' and 112b' between stent segments 100 and 100a are displaced from each other upon expansion of the stent as seen in Figure 2 A.
  • the end portions are no
  • Struts 112 are distributed in a helical fashion wherein a specific pattern of connection between stent portions is implemented.
  • the configuration of struts to connectors results in an improved stent having a more uniform structure wherein joined
  • an extended stent 201 is formed from a plurality of adjacent stent segments 202 which are affixed to
  • connection region 214 comprises a pair of interconnecting elements 212a and 212b, wherein each of interconnecting elements 212a and 212b is one-half the width of a connector 114 as shown in Figure 2 A.
  • the relationship between connectors 212a and 212b can be more easily seen in the enlarged view shown in Figure 7, which represents a connection region
  • connectors 212a and 212b are attached to one another by welding or other appropriate means.
  • the width of each connector 212a and 212b is one-half that of a connector 114, permitting the length of stent 201 to be easily
  • Connectors 212a and 212b extend substantially lengthwise with respect to one another so as to promote flexibility in the connection regions 214 and in the stents themselves. Although flexibility is maintained, when stent 201 is radially expanded, the present configuration also ensures radial strength and prevents kinking between adjacent stent segments. The present invention configuration thereby enables the extended stent to bend through tortuous portions of a blood vessel into which it is inserted and simultaneously maintain the patency of that vessel over an extended period of time.
  • Interconnecting elements 212a and 212b can be fabricated from an extension 210 which is formed from the undulating wave-like pattern shown in Figures 3A-3F.
  • the present process for stent manufacture already discloses formation of a connector from the cut ribbon 200, it is easy to cut the width of connecting portion 210 so that the resulting interconnecting elements 212a and 212b have one-half the width of the original portion.
  • formation of the half- width interconnection elements would not require additional cost or extensive effort to complete, resulting in a stent which is easier and cheaper to manufacture.
  • the present invention is designed to provide an improved method of manufacturing a spiral wound stent, it is contemplated that such a method can be used with conventional tubular style stents, as well.
  • the present invention shows a method of fabricating longer radius-style stents by combining multiple stents. This technique can be used on any style of stent where overlapping struts or connectors can be combined.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Physics & Mathematics (AREA)
  • Vascular Medicine (AREA)
  • Optics & Photonics (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Prostheses (AREA)

Abstract

La présente invention concerne un stent tubulaire auto-déployant (201) comprenant plusieurs segments (202). Chacun de ces segments (202) est constitué d'un ruban allongé possédant des portions coupées afin de former une structure ondulante, de type onde, dont les extrémités opposées sont attachées afin de prendre une configuration généralement cylindrique. Un procédé permet de réaliser la formation d'un tel stent tubulaire déployable qui consiste d'abord mettre en oeuvre un ruban plat allongé de matériau biocompatible et à déplacer sélectivement des portions de ce matériau afin de former une structure ondulante, du type onde, sur la longueur du ruban. Ce ruban est alors cintré dans une configuration généralement cylindrique et les extrémités opposées du ruban sont attachées l'une à l'autre afin de former une section de stent en spirale généralement cylindrique et déployable. Ces sections, après formation de plusieurs d'entre elles, sont disposées en succession longitudinale puis interconnectées afin de prendre une configuration de stent allongé.
EP00945010A 1999-07-02 2000-06-29 Stent enroule en spirale Withdrawn EP1194081A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US347066 1999-07-02
US09/347,066 US6551351B2 (en) 1999-07-02 1999-07-02 Spiral wound stent
PCT/US2000/017987 WO2001001889A1 (fr) 1999-07-02 2000-06-29 Stent enroule en spirale

Publications (1)

Publication Number Publication Date
EP1194081A1 true EP1194081A1 (fr) 2002-04-10

Family

ID=23362180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00945010A Withdrawn EP1194081A1 (fr) 1999-07-02 2000-06-29 Stent enroule en spirale

Country Status (3)

Country Link
US (1) US6551351B2 (fr)
EP (1) EP1194081A1 (fr)
WO (1) WO2001001889A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006024488A2 (fr) 2004-08-30 2006-03-09 Interstitial Therapeutics Endoprothese medicale pourvue d'inhibiteurs de la synthese d'atp

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WO2001089421A2 (fr) 2000-05-22 2001-11-29 Orbus Medical Technologies Inc. Extenseur auto-extensible
US6572646B1 (en) * 2000-06-02 2003-06-03 Advanced Cardiovascular Systems, Inc. Curved nitinol stent for extremely tortuous anatomy
GB0019107D0 (en) * 2000-08-03 2000-09-27 Ranier Ltd Balloon-free uninary catheter
GB0020491D0 (en) 2000-08-18 2000-10-11 Angiomed Ag Stent with attached element and method of making such a stent
DE60209583T2 (de) * 2001-03-30 2006-12-21 Terumo K.K. Stent
US7578841B2 (en) 2001-09-24 2009-08-25 Boston Scientific Scimed, Inc. Stent with protruding branch portion for bifurcated vessels
US7144420B2 (en) * 2002-03-14 2006-12-05 Boston Scientific Scimed, Inc. Segmented spine
US9561123B2 (en) 2002-08-30 2017-02-07 C.R. Bard, Inc. Highly flexible stent and method of manufacture
US6878162B2 (en) 2002-08-30 2005-04-12 Edwards Lifesciences Ag Helical stent having improved flexibility and expandability
US7637942B2 (en) 2002-11-05 2009-12-29 Merit Medical Systems, Inc. Coated stent with geometry determinated functionality and method of making the same
US7875068B2 (en) 2002-11-05 2011-01-25 Merit Medical Systems, Inc. Removable biliary stent
US7959671B2 (en) 2002-11-05 2011-06-14 Merit Medical Systems, Inc. Differential covering and coating methods
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